Steam-engine governor



(No Model.)

B. L. ARNOLD.

STEAM ENGINE GOVERNOR.

Patented Aug. 16, 1887.

WITNESSES 2 5%,

ATTORNEYS.

k i i I I l UNITED STATES PATENT OFFICE.

ELTPHALET L. ARNOLD, OF MONTGOMERY, TEXAS.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 368,370, dated August16, 1887.

Application filed December 29, 1886. Serial No. 222,921. (No model.)

To all whom it may concern.-

Be it known that I, ELIPHALET L. ARNOLD, of Montgomery, in the county ofMontgomery and State of Texas, have invented a new and ImprovedAttachment for Steam-Engine Governors, of which the following is a full,clear, and exact description.

The object of my invention is to provide a new and improvedsteam-engine-governor attachment which permits of operating the en gineto its full capacit-ywhen the pressure in the steam-chest increases.

The invention consists of the construction and arrangement of variousparts and details and combinations of the same, as will be fullydescribed hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawing, forming a part ofthis specification, in which the figure represents a side elevation ofmy improvement,with parts in section.

On the steam-chest A is secureda governor, B, of any approvedconstruction and provided with the usual valve-stem, O, carrying on itslower end the usual valve (not shown) which regulates the amount ofsteam admitted to the steam'chest. On the upper part of the valvestem Care connected, in any suitable manner, the balls D, operating on thesaid valve-stem G. The valve -stem 0 is provided with the collar E,resting on the lever F, fulcrumed on a standard attached to thegovernor-frame. A rod, G, is secured by one end to the said lever F, andoperates with its other end against a coiled spring held in a casing, H,supported on a bracket fastened to the governor-frame. The outer end ofthe lever F connects by a link, I, with one end of the weighted lever J,fulcrnmed on a bracket secured to the steamchest A. The other end of thelever J is connected with the piston-rod K, carrying the piston L,operating in a small cylinder, N, connected at its inner end, by a pipeor other means, with the interior of the steam-chest A.

My improved governor is specially adapted for engines operatingsaw-mills and similar machinery, in which the load which the engine isto carry is suddenly changed, and which, as heretofore constructed, areopen to the objection or difficulty that the governor closes the valveat a moment when the engine attains its full speed and the heavy load isthrown upon admission of steam to the valve-chest A is obtained; butwhen the engine attains its full speed and the pressure is at itshighest point, then the balls D are forced outward and close the valveat the moment when theload is added to the engine-that is, for instance,starting the saws into the log. The engine, in consequence of this, willrun slower, as very little steam is admitted to the steam-chest, and theengine is not able to start the saws into the log to be out until thespeed of the engine has increased.

lVith my device I prevent the slow speed of the engine at the momentwhen the saws are starting to cut into the log. It will be seen thatwhen the steam-pressure i n the steam-chest A increases, then thesteam-pressure is exerted against the piston L in the small cylinder N,and the piston L and its rod K are forced outward and cause the lever Jto swing in the direction of the arrow to, so that one end of the leverF is pulled downward, while the other end, acting on the collar E,forces the valvestem 0 upward and holds the balls D firmly closed andthe valve open, so that the engine can operate to its full capacity.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In agovernor for steam-engines, the combination, with the valve-stemand the governor-balls, of a lever connected with the said valve-stem, aweighted lever connected with the said valve-stem lever, a pistonrodconnected with the said weighted lever, a piston attached to the saidpiston-rod, and a small cylinder in which the said piston operates,andwhich is connected at one end with the interior of the steam-chest,substantially as shown and described.

2. The combination, with a valve-chest and Lil a governor, of a leveroperating on the valvestem of the said governor, a weighted leverconnected with the said valve-stem lever, a piston-rod connected withthe said weighted lever, a piston attached to the said piston-rod, and asmall cylinder in which operates the said piston, and which is connectedat one end with the interior of the said steam-chest, substantially asshown-and described.

3. In a governor, the cylinder N, connected with the interior of thesteam-chest, the piston L, operating in thesaid cylinder, the piston-rodK, carrying the said piston L, the lethe said lever F, thegovernor-valve stem 0,

carrying the said collar E, and the governorballs D, operating on thesaid governor-valve 2o stem 0, substantially as shown and described.

ELIPHALET L. ARNOLD.

WVitnesses J. H. DAVIS, I. O, DAVIS.

